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Move parsing of subscribable events off critical path
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| // Copyright (c) Aptos Foundation | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| use aptos_infallible::Mutex; | ||
| use once_cell::sync::OnceCell; | ||
| use rayon::ThreadPool; | ||
| use std::{ops::Deref, sync::mpsc::Receiver}; | ||
|
|
||
| #[derive(Debug)] | ||
| pub struct Planned<T> { | ||
| value: OnceCell<T>, | ||
| rx: OnceCell<Mutex<Receiver<T>>>, | ||
| } | ||
|
|
||
| impl<T> Planned<T> { | ||
| pub fn place_holder() -> Self { | ||
| Self { | ||
| value: OnceCell::new(), | ||
| rx: OnceCell::new(), | ||
| } | ||
| } | ||
|
|
||
| pub fn plan(&self, thread_pool: &ThreadPool, getter: impl FnOnce() -> T + Send + 'static) | ||
| where | ||
| T: Send + 'static, | ||
| { | ||
| let (tx, rx) = std::sync::mpsc::channel(); | ||
|
|
||
| thread_pool.spawn(move || { | ||
| tx.send(getter()).ok(); | ||
| }); | ||
|
|
||
| self.rx.set(Mutex::new(rx)).expect("Already planned."); | ||
| } | ||
|
|
||
| pub fn ready(t: T) -> Self { | ||
| Self { | ||
| value: OnceCell::with_value(t), | ||
| rx: OnceCell::new(), | ||
| } | ||
| } | ||
|
|
||
| pub fn get(&self) -> &T { | ||
| if let Some(t) = self.value.get() { | ||
| t | ||
| } else { | ||
| let rx = self.rx.get().expect("Not planned").lock(); | ||
| if self.value.get().is_none() { | ||
| let t = rx.recv().expect("Plan failed."); | ||
| self.value.set(t).map_err(|_| "").expect("Already set."); | ||
| } | ||
| self.value.get().expect("Must have been set.") | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl<T> Deref for Planned<T> { | ||
| type Target = T; | ||
|
|
||
| fn deref(&self) -> &Self::Target { | ||
| self.get() | ||
| } | ||
| } | ||
|
|
||
| pub trait Plan { | ||
| fn plan<T: Send + 'static>(&self, getter: impl FnOnce() -> T + Send + 'static) -> Planned<T>; | ||
| } | ||
|
|
||
| impl Plan for ThreadPool { | ||
| fn plan<T: Send + 'static>(&self, getter: impl FnOnce() -> T + Send + 'static) -> Planned<T> { | ||
| let planned = Planned::<T>::place_holder(); | ||
| planned.plan(self, getter); | ||
| planned | ||
| } | ||
| } |
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